package com.itheima.service;

import pojo.Member;

import java.util.List;

/**
 * 会员服务接口
 */
public interface MemberService {
    
    Member findMemberByPhoneNumber(String phoneNumber);
    
    void add(Member member);
    
    List<Integer> findMemberCountsListByRegTimes(List<String> months);
}
